CN102817836A - Hydraulic descent control device - Google Patents
Hydraulic descent control device Download PDFInfo
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- CN102817836A CN102817836A CN201210328033XA CN201210328033A CN102817836A CN 102817836 A CN102817836 A CN 102817836A CN 201210328033X A CN201210328033X A CN 201210328033XA CN 201210328033 A CN201210328033 A CN 201210328033A CN 102817836 A CN102817836 A CN 102817836A
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Abstract
The invention provides a hydraulic descent control device. The device structurally comprises a hydraulic speed regulator and a wire rope, wherein the hydraulic speed regulator is composed of a stator and a rotor, the rotor is arranged on the outer side of the stator in a sleeving mode, and one end of the wire rope is fixed on an outer wall of a rotating cylinder of the rotor. Compared with the prior art, the hydraulic descent control device has the advantages that the stator and the rotor are always in good contact, the tightness is good, the rotation is stable, the noise is low, the tensile strength is high, the environment adaptive capacity is high, the descent rate is flexible and adjustable, the device can be used for suspending various persons, and the life-saving effect is good.
Description
Technical field
The present invention relates to a kind of high-rise safe escape device, specifically a kind of descent control device simple in structure, hydraulically powered.
Background technique
Along with nearly rapid development of economy decades of China, people's housing condition has also had very big improvement, and increasing people has moved the building inhabitation to from one-storey house.The urbanization process of China develops very soon, and various tall buildings emerge in large numbers one after another in the every nook and cranny in the whole nation, for motherland has increased the beautiful landscape of a lot of.
Yet the worry that is accompanied by the appearance puzzlement people of a large amount of tall buildings also can be comed one after another, and is example with the fire of high-rise building.In case the tall building breaking out of fire, all outlet ports is all shut by big fire, and people's escape has often just become problem, and how leaving the scene of a fire as early as possible is the key factor that the person for help is able to survive.There are some escaping descent control devices to occur in the market; But these lifesaving descent control device ubiquity volumes are big, the life-span is short, noise is big, cost is high, delay shortcomings such as falling poor effect; The reason that produces the problems referred to above is to have adopted friction transmission mode; Adopt the descent control device of this kind of drive in use intermittent the rotation to occur through regular meeting, one one of wire rope landing process causes the lifesaving weak effect if having oil, water to get into to use; Thereby people urgently hope the high-altitude life-saving appliance that has a kind of lifesaving effective, and the personnel when reducing outer dangerous situation injure and property loss.
Summary of the invention
Technical assignment of the present invention is the deficiency that solves existing technology, provides a kind of and slowly falls the process smoothness, reduction of speed is adjustable, profit immerses the hydraulic driving descent control device that does not have influence.
Technological scheme of the present invention realizes by following mode; This hydraulic type descent control device; Its structure comprises hydrodynamic governor, wire rope, and said hydrodynamic governor is made up of stator, rotor, and the rotor socket is arranged on the rotating cylinder outer wall of the stator outside and this rotor a fixedly end of wire rope.The vane pump inverted configuration of technological scheme provided by the invention and existing technology, rotor socket are arranged on the stator outside, through the up-down of fluid flow control wire rope.
As improvement; Said stator comprises stator axis, is movably arranged on the some blades on the stator axis through elastic component; Stator axis axially on offer three oilholes with exterior, wherein two oilholes are tank filler sleeve, oil drainage hole, another oilhole is the Flow-rate adjustment hole; Said tank filler sleeve, oil drainage hole and Flow-rate adjustment hole all are communicated with pressure oilhole and the oil-sucking hole that is opened on the stator axis sidewall, and this pressure oilhole also is connected with the blade bottom.
In technique scheme; Blade pass crosses that elastic component is active to be connected on the stator axis; Lean on the elastic force effect of elastic component to combine like this, make blade tightly touch rotor, guarantee hydraulic pressure strength and sealing effect between per two adjacent blades with the oil pressure effect of blade bottom; On stator axis, offer three oilholes, wherein tank filler sleeve and oil drainage hole also can be used for measuring stator axis internal hydraulic pressure intensity except that being used to refuel the oil extraction, in use tank filler sleeve and oil drainage hole sealing are got final product; The design in Flow-rate adjustment hole is derived from water valve from the beginning, adopts this technology can realize the flow as control hydraulic oil as the control tap water flow, the rotating speed of the variation control rotor through flow; Press oilhole, oil-sucking hole to cooperate pumping cavity, oil sucting cavity, pressure oil groove, oil suction groove, oil guide slot, Oil Guide road in the following technical proposals in the inner mobile loop of hydraulic oil that forms of descent control device, to guarantee the formation of hydraulic pressure jointly.
As preferably, said blade is provided with six and be movably arranged on the stator axis through spring.The setting of six blades is science the most, the hydraulic control best results of realization.
As improvement; Said rotor comprises left sealing cover, rotating cylinder, right sealing cover; Said left sealing cover, right sealing cover are provided with the axis hole that cooperates socket with stator axis; On right sealing cover, offer respectively and press oilhole and the corresponding pressure oil groove of oil-sucking hole and oil suction groove, the pumping cavity of worm shape, the oil sucting cavity of worm shape, be connected through oil guide slot between said pumping cavity and the pressure oil groove, be connected through the Oil Guide road between oil sucting cavity and the oil suction groove around axis hole.
Left sealing cover in the technique scheme is through being bolted to the left side of stator axis, and this left side sealing cover is stretched out in the left part of stator axis simultaneously; Right sealing cover is through being bolted to the right side of stator axis, and this right side sealing cover is stretched out in the right part of stator axis simultaneously; Rotating cylinder then is socketed in the stator axis outside of band blade.
Wherein pressure oil groove, oil suction groove, pumping cavity, oil sucting cavity the flow circuits of accomplishing whole hydraulic oil is set, encapsulation is good, suction capacity is strong, rotation process is comparatively steady.
As improvement; Evenly offer the slow hole of pressing of some transition on the said right sealing cover; The slow thickness distance of pressing the diameter distance in hole of this transition less than blade, the slow hole of pressing of this transition is connected with pumping cavity through transition slot, and the bore of said transition slot becomes big gradually with slow hole to the pumping cavity of pressing of transition.This technological scheme can make between the blade and slowly all press at working stage, thereby makes blade pressure when work basic identical, avoids the intermittence of rotor to rotate, and guarantees the fluency of rotor rotation.
As preferably, it is the curve bath shape in the center of circle that said pumping cavity, oil sucting cavity all are with the axis hole center of circle.Adopt this technological scheme, guarantee the service behaviour needs of right sealing cover on the one hand, be easy on the other hand make, fabricating cost is comparatively cheap.
As improvement; Said rotating cylinder is socketed in the blade outside of stator; Its excircle is circular; Inner circumference is an irregular cycle, and this irregular cycle is linked in sequence by arc section a, changeover portion b and changeover portion c, and the center of circle of said arc section a is identical with the rotating cylinder excircle center of circle, radius is 150 degree greater than stator radius, arc angle; Said changeover portion b and changeover portion c be mirror image each other, and the distance between the point of contact of changeover portion b and changeover portion c and the rotating cylinder excircle center of circle is the shortest, and this distance is greater than the stator axis radius length, less than the distance of arc section a.The circle of peculiar shape can make rotor in rotation process in this technological scheme; Blade can discharge, shrink in the fixed position; Each fluid flow volume that sucks that rotates is identical between per two blades simultaneously; Add the booster action of the slow Kong Yuhuan of pressure of transition indent, the rotation process noise is less, stability of rotation.
As preferably, on the axis hole of said left sealing cover, be provided with seal groove on the oil suction groove left and right sides axis hole of right sealing cover, closely be provided with seal ring in the seal groove.So just can oil suction structure, the oily structure of pressure be separated into and seal independently sealed chamber, guarantee the hydraulic effect that produces.
As improvement; Said descent control device is fixed in the Pear Shaped packing case; This packing case comprises left fixed cover, right fixed cover two-part; Said left fixed cover and stator axis left part matching and fixing, right fixed cover and stator axis right part matching and fixing offer on right fixed cover and Flow-rate adjustment hole, tank filler sleeve, through hole that oil drainage hole is corresponding.
As preferably, the outer end circumference of said right sealing cover is provided with the outer ring gear, is fixed with cross gear on the right fixed cover, and the tooth portion of this cross gear is meshed with the tooth portion of outer ring gear.The outer ring gear drives cross gear with recovery and cooperates rotation, and the axle of cross gear leads to the outside, and the outside is used for rotary rotor to driving force, after the staff finishes using, can accomplish the recovery of wire rope through the adjusting cross gear.
In sum, the beneficial effect of the present invention's generation is:
Characteristics such as that hydraulic type descent control device of the present invention has is simple in structure, easy to use, be skillfully constructed, volume is little, in light weight, with low cost, long service life, rotor remains good the contact with stator, and encapsulation is good; Stability of rotation, noise is less, and tensile strength is high; Adaptive capacity to environment is strong, and rate of descent is adjustable flexibly, and is easy to use; Can hang various crowds, lifesaving is respond well.
Description of drawings
Accompanying drawing 1 is an internal structure schematic representation of the present invention.
Accompanying drawing 2 is stator schematic representation of the present invention.
Accompanying drawing 3 is right elevations of Fig. 2.
Accompanying drawing 4 is right sealing cover left views of the present invention.
Accompanying drawing 5 is rotating cylinder sectional views of the present invention.
Accompanying drawing 6 is that stator is installed in the sectional view in the rotating cylinder.
Accompanying drawing 7 is left fixed cover schematic representation of the present invention.
Accompanying drawing 8 is right fixed cover schematic representation of the present invention.
Accompanying drawing 9 is the schematic representation after the present invention assembles.
Mark in the accompanying drawing is represented respectively:
1, left sealing cover, 2, rotating cylinder, 2.1, arc section a, 2.2, changeover portion b, 2.3, changeover portion c, 3, right sealing cover, 3.1, pressure oil groove; 3.2, pumping cavity, 3.3, oil sucting cavity, 3.4, the oil suction groove, 3.5, seal groove, 3.6, the outer ring gear, 3.7, axis hole, 3.8, oil guide slot; 3.9, the slow hole of pressing of transition, 3.10, transition slot, 3.11, the Oil Guide road, 4, stator, 4.1, stator axis, 4.2, press oilhole, 4.3, oil-sucking hole; 4.4, tank filler sleeve, 4.5, the Flow-rate adjustment hole, 4.6, blade, 4.7, spring eye, 4.8, oil drainage hole, 4.9, spring; 5, wire rope, 6, left fixed cover, 7, right fixed cover, 7.1, through hole, 7.2, cross gear, 8, hanger.
Embodiment
Below in conjunction with accompanying drawing a kind of hydraulic type descent control device of the present invention is done following the detailed description.
Shown in accompanying drawing 1; A kind of hydraulic type descent control device is provided at present; Its structure comprises hydrodynamic governor, wire rope 5, and said hydrodynamic governor is made up of stator 4, rotor, and the rotor socket is arranged on rotating cylinder 2 outer walls of stator 4 outsides and this rotor a fixedly end of wire rope 5.
Like accompanying drawing 2, Fig. 3, shown in Figure 6; Said stator 4 comprises stator axis 4.1, is movably arranged on six blades 4.6 on the stator axis 4.1 through spring 4.9; Sockets are provided with spring work pin in the spring 4.9, on stator axis 4.1, offer the spring eye 4.7 that can stretch out spring 4.9, stator axis 4.1 axially on offer three oilholes with exterior; Wherein two oilholes are tank filler sleeve 4.4, oil drainage hole 4.8; Another oilhole is Flow-rate adjustment hole 4.5, and said tank filler sleeve 4.4, oil drainage hole 4.8 and Flow-rate adjustment hole 4.5 all are communicated with pressure oilhole 4.2 and the oil-sucking hole 1.3 that is opened on stator axis 4.1 sidewalls, and this pressure oilhole 4.2 also is connected with blade 4.6 bottoms.
Like accompanying drawing 1, shown in Figure 4; Said rotor comprises left sealing cover 1, rotating cylinder 2, right sealing cover 3; Said left sealing cover 1, right sealing cover 3 is provided with stator axis 4.1 cooperates the axis hole 3.7 of socket; On right sealing cover 3, offer respectively and press oilhole 4.2 and oil-sucking hole 4.3 corresponding pressure oil grooves 3.1 and oil suction groove 3.4, pumping cavity 3.2, oil sucting cavity 3.3, between said pumping cavity 3.2 and the pressure oil groove 3.1, be connected through oil guide slot 3.8, Oil Guide road 3.11 respectively between oil sucting cavity 3.3 and the oil suction groove 3.4 around axis hole 3.7.Evenly offer the slow hole 3.9 of pressing of some transition on the said right sealing cover 3; The slow thickness distance of pressing the diameter distance in hole 3.9 of this transition less than blade 4.6; The slow pressure between hole 3.9 and the pumping cavity of this transition is provided with transition slot 3.10; Transition is slow presses between hole 3.9 and the transition slot 3.10, all be semi-connected shape between transition slot 3.10 and the pumping cavity 3.2, and said transition slot 3.10 is and delays pressure hole 3.9 to pumping cavity 3.2 diameters with transition and become big taper triangular groove gradually.The slow hole 3.9 of pressing of this transition is the circular-arc inboard that is evenly arranged in right sealing cover.
Said pumping cavity 3.2, oil sucting cavity 3.3 all is with axis hole 3.7 centers of circle is the curve bath shape in the center of circle.
Like accompanying drawing 5, shown in Figure 6; Said rotating cylinder 2 is socketed in blade 4.6 outsides of stator 4; Its excircle is circular; Inner circumference is an irregular cycle, and this irregular cycle is linked in sequence by arc section a 2.1, changeover portion b 2.2 and changeover portion c 2.3, and the center of circle of said arc section a 2.1 is identical with the rotating cylinder 2 excircle centers of circle, radius is 150 degree greater than stator axis 4.1 radiuses, arc angle; Said changeover portion b 2.2 and changeover portion c 2.3 be mirror image each other, and the distance between the point of contact of changeover portion b 2.2 and changeover portion c 2.3 and the rotating cylinder 2 excircle centers of circle is the shortest, and this distance is greater than stator axis 4.1 radius length, less than the distance of arc section a 2.1.
Shown in accompanying drawing 1, on the axis hole 3.7 of said left sealing cover 1, be provided with seal groove 3.5 on oil suction groove 3.4 left and right sides axis holes 3.7 of right sealing cover 3, closely be provided with seal ring in the seal groove 3.5.
Be fixed in the Pear Shaped packing case like accompanying drawing 7, the said descent control device of Fig. 8; This packing case comprises left fixed cover 6, right fixed cover 7 two-part; Said left fixed cover 6 and stator axis 4.1 left part matching and fixing; Right fixed cover 7 and stator axis 4.1 right part matching and fixing offer the through hole 7.1 corresponding with Flow-rate adjustment hole 4.5, tank filler sleeve 4.4, oil drainage hole 4.8 on right fixed cover 7.
Like accompanying drawing 1, shown in Figure 8, the outer end circumference of said right sealing cover 3 is provided with outer ring gear 3.6, is fixed with cross gear 7.2 on the right fixed cover 7, and the tooth portion of this cross gear 7.2 is meshed with the tooth portion of outer ring gear 3.6.
Shown in accompanying drawing 9, after the whole descent control device assembling, a hanger 8 is installed at the packing case top, the wire rope outlet is offered in the packing case side.
During hydraulic slow drop device of the present invention work, at first be suspended on the fixed buildings through hanger 8, the other end of wire rope 5 is fastened on one's body the user, or wire rope 5 is suspended on the fixed buildings, and hanger 8 is fastened on one's body the user.Regulate flow through Flow-rate adjustment hole 4.5; Rotate wire rope 5, rotor portion rotates the volume between per two blades 4.6 is changed, and then makes oil produce pressure; Become greatly example gradually with volume between the blade 4.6; Oil imports pressure oil groove 3.1 from pumping cavity 3.2 through oil guide slot 3.8 under pressure, and the bottom that is communicated with six blade 4.6 right sides because of pressure oil groove 3.1 all produces outside thrust, and blade 4.6 closely contacts with rotating cylinder 2 inwalls; Rotation along with rotor; Volume reduces gradually between the blade 4.6; Hydraulic oil is imported in the rotor shaft oil ducts through pressing oilhole 4.2, and regulates the flow size that oil ducts lead to oil-sucking hole 4.3 places through Flow-rate adjustment hole 4.5, and the hydraulic oil of sucking-off gets into oil suction groove 3.4; Get in the oil sucting cavity 3.3 the repetitive cycling above-mentioned steps again through Oil Guide road 3.11.
All connect fixing and sealing between left sealing cover of the present invention 1, rotating cylinder 2, the right sealing cover 3, offer fixing threaded hole in left sealing cover 1, rotating cylinder 2, right sealing cover 3 correspondences through bolt and sealer; Flow-rate adjustment hole 4.5 on the said rotor shaft is regulated through the Flow-rate adjustment bolt; Right fixed cover 7 is stretched out in the outer end of Flow-rate adjustment bolt; With convenient carrying out smoothly of regulating; In addition, left fixed cover 6, right fixed cover 7 all through clamping bolt and with six side's matching and fixing at stator axis two ends on stator axis, also offer the auxiliary screw of reinforcing in the edge of left fixed cover 6, right fixed cover 7.
In addition, as to further improvement of the present invention, also can emergency braking mechanism be set, but this emergency braking mechanism built-in sensors is controlled through remote control at rotor portion cross gear place 7.2 or in wire rope 5 outlet ports of packing case.
For further alleviating the weight of this descent control device; Can the loaded down with trivial details step of bolt installation can be reduced like this through welding technique with left sealing cover 1, rotating cylinder 2,3 the no seam welding of right sealing cover, the weight of construction bolt can also be saved; The enhanced leaktightness performance guarantees the small volume and the little weight of this descent control device.
Also should explain at this; The present invention and the foregoing description are only explained the main improvement part of invention, and obviously, enforcement of the present invention also depends on the selection of hydraulic oil; In addition in the foregoing description; Outer ring gear, cross gear structure on the right sealing cover do not describe in detail, and this is because these are existing technology, just gives unnecessary details no longer one by one at this.
In the above-described embodiments, preferred forms of the present invention is described, obviously; Under design of the present invention, still can make a lot of variations, for example also can change the face shaping of packing case; Repack shapes such as semicircle, ellipse into; At this, should explain that any change of under this bright design, being made all will fall in protection scope of the present invention.
Claims (10)
1. hydraulic type descent control device, it is characterized in that: its structure comprises hydrodynamic governor, wire rope, and said hydrodynamic governor is made up of stator, rotor, and the rotor socket is arranged on the rotating cylinder outer wall of the stator outside and this rotor a fixedly end of wire rope.
2. hydraulic type descent control device according to claim 1; It is characterized in that: said stator comprises stator axis, is movably arranged on the some blades on the stator axis through elastic component; Stator axis axially on offer three oilholes with exterior, wherein two oilholes are tank filler sleeve, oil drainage hole, another oilhole is the Flow-rate adjustment hole; Said tank filler sleeve, oil drainage hole and Flow-rate adjustment hole all are communicated with pressure oilhole and the oil-sucking hole that is opened on the stator axis sidewall, and this pressure oilhole also is connected with the blade bottom.
3. hydraulic type descent control device according to claim 2 is characterized in that: said blade is provided with six and be movably arranged on the stator axis through spring.
4. hydraulic type descent control device according to claim 2; It is characterized in that: said rotor comprises left sealing cover, rotating cylinder, right sealing cover; Said left sealing cover, right sealing cover are provided with the axis hole that cooperates socket with stator axis; On right sealing cover, offer respectively and press oilhole and the corresponding pressure oil groove of oil-sucking hole and oil suction groove, the pumping cavity of worm shape, the oil sucting cavity of worm shape around axis hole; Be connected through oil guide slot between said pumping cavity and the pressure oil groove, be connected through the Oil Guide road between oil sucting cavity and the oil suction groove.
5. hydraulic type descent control device according to claim 4; It is characterized in that: evenly offer the slow hole of pressing of some transition on the said right sealing cover; The slow thickness distance of pressing the diameter distance in hole of this transition less than blade; The slow hole of pressing of this transition is connected with pumping cavity through transition slot, and the bore of said transition slot becomes big gradually with slow hole to the pumping cavity of pressing of transition.
6. hydraulic type descent control device according to claim 4 is characterized in that: it is the curve bath shape in the center of circle that said pumping cavity, oil sucting cavity all are with the axis hole center of circle.
7. hydraulic type descent control device according to claim 4; It is characterized in that: said rotating cylinder is socketed in the blade outside of stator; Its excircle is circular; Inner circumference is an irregular cycle, and this irregular cycle is linked in sequence by arc section a, changeover portion b and changeover portion c, and the center of circle of said arc section a is identical with the rotating cylinder excircle center of circle, radius is 150 degree greater than stator radius, arc angle; Said changeover portion b and changeover portion c be mirror image each other, and the distance between the point of contact of changeover portion b and changeover portion c and the rotating cylinder excircle center of circle is the shortest, and this distance is greater than the stator axis radius length, less than the distance of arc section a.
8. hydraulic type descent control device according to claim 4 is characterized in that: on the axis hole of said left sealing cover, be provided with seal groove on the oil suction groove left and right sides axis hole of right sealing cover, closely be provided with seal ring in the seal groove.
9. according to the arbitrary described hydraulic type descent control device of claim 1～8; It is characterized in that: said descent control device is fixed in the Pear Shaped packing case; This packing case comprises left fixed cover, right fixed cover two-part; Said left fixed cover and stator axis left part matching and fixing, right fixed cover and stator axis right part matching and fixing offer on right fixed cover and Flow-rate adjustment hole, tank filler sleeve, through hole that oil drainage hole is corresponding.
10. hydraulic type descent control device according to claim 9 is characterized in that: the outer end circumference of said right sealing cover is provided with the outer ring gear, is fixed with cross gear on the right fixed cover, and the tooth portion of this cross gear is meshed with the tooth portion of outer ring gear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210328033.XA CN102817836B (en) | 2012-09-07 | 2012-09-07 | Hydraulic descent control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210328033.XA CN102817836B (en) | 2012-09-07 | 2012-09-07 | Hydraulic descent control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102817836A true CN102817836A (en) | 2012-12-12 |
| CN102817836B CN102817836B (en) | 2015-03-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210328033.XA Expired - Fee Related CN102817836B (en) | 2012-09-07 | 2012-09-07 | Hydraulic descent control device |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3847377A (en) * | 1973-06-07 | 1974-11-12 | Safety Devices Inc | Safety lowering device |
| US4018423A (en) * | 1975-10-16 | 1977-04-19 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Emergency descent device |
| JPH0165047U (en) * | 1987-10-16 | 1989-04-26 | ||
| WO2004004836A1 (en) * | 2002-07-05 | 2004-01-15 | Fallsafe Technology Pty Ltd | Descent apparatus |
| CN201324450Y (en) * | 2008-12-28 | 2009-10-14 | 朱太国 | High altitude lifesaving hydraulic descent control device |
| CN201643461U (en) * | 2010-04-22 | 2010-11-24 | 柳爵金 | Hydraulic-pressure escape system in tall building |
| CN101972522A (en) * | 2010-11-11 | 2011-02-16 | 长安大学 | Hydraulic resistance type tall building escape device |
-
2012
- 2012-09-07 CN CN201210328033.XA patent/CN102817836B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3847377A (en) * | 1973-06-07 | 1974-11-12 | Safety Devices Inc | Safety lowering device |
| US4018423A (en) * | 1975-10-16 | 1977-04-19 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Emergency descent device |
| JPH0165047U (en) * | 1987-10-16 | 1989-04-26 | ||
| WO2004004836A1 (en) * | 2002-07-05 | 2004-01-15 | Fallsafe Technology Pty Ltd | Descent apparatus |
| CN201324450Y (en) * | 2008-12-28 | 2009-10-14 | 朱太国 | High altitude lifesaving hydraulic descent control device |
| CN201643461U (en) * | 2010-04-22 | 2010-11-24 | 柳爵金 | Hydraulic-pressure escape system in tall building |
| CN101972522A (en) * | 2010-11-11 | 2011-02-16 | 长安大学 | Hydraulic resistance type tall building escape device |
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| Publication number | Publication date |
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| CN102817836B (en) | 2015-03-25 |
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Granted publication date: 20150325 Termination date: 20210907 |